// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
namespace SharpCifs.Smb
{
    internal class SmbComReadAndX : AndXServerMessageBlock
    {
        private static readonly int BatchLimit
            = Config.GetInt("jcifs.smb.client.ReadAndX.Close", 1);

        private long _offset;

        private int _fid;

        private int _openTimeout;

        internal int MaxCount;

        internal int MinCount;

        internal int Remaining;

        public SmbComReadAndX() : base(null)
        {
            Command = SmbComReadAndx;
            _openTimeout = unchecked((int)(0xFFFFFFFF));
        }

        internal SmbComReadAndX(int fid,
                                long offset,
                                int maxCount,
                                ServerMessageBlock andx) : base(andx)
        {
            this._fid = fid;
            this._offset = offset;
            this.MaxCount = MinCount = maxCount;
            Command = SmbComReadAndx;
            _openTimeout = unchecked((int)(0xFFFFFFFF));
        }

        internal virtual void SetParam(int fid, long offset, int maxCount)
        {
            this._fid = fid;
            this._offset = offset;
            this.MaxCount = MinCount = maxCount;
        }

        internal override int GetBatchLimit(byte command)
        {
            return command == SmbComClose ? BatchLimit : 0;
        }

        internal override int WriteParameterWordsWireFormat(byte[] dst, int dstIndex)
        {
            int start = dstIndex;
            WriteInt2(_fid, dst, dstIndex);
            dstIndex += 2;
            WriteInt4(_offset, dst, dstIndex);
            dstIndex += 4;
            WriteInt2(MaxCount, dst, dstIndex);
            dstIndex += 2;
            WriteInt2(MinCount, dst, dstIndex);
            dstIndex += 2;
            WriteInt4(_openTimeout, dst, dstIndex);
            dstIndex += 4;
            WriteInt2(Remaining, dst, dstIndex);
            dstIndex += 2;
            WriteInt4(_offset >> 32, dst, dstIndex);
            dstIndex += 4;
            return dstIndex - start;
        }

        internal override int WriteBytesWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int ReadParameterWordsWireFormat(byte[] buffer, int bufferIndex)
        {
            return 0;
        }

        internal override int ReadBytesWireFormat(byte[] buffer, int bufferIndex)
        {
            return 0;
        }

        public override string ToString()
        {
            return "SmbComReadAndX["
                        + base.ToString()
                        + ",fid=" + _fid
                        + ",offset=" + _offset
                        + ",maxCount=" + MaxCount
                        + ",minCount=" + MinCount
                        + ",openTimeout=" + _openTimeout
                        + ",remaining=" + Remaining
                        + ",offset=" + _offset + "]";
        }
    }
}
